Headlight for vehicles.



G. M. HALL. HEADLIGHT FOR VEHIOLES. APPLIUATION FILED MAR, 22, 1909.

1,087,168. Patented Feb. 17,1914.

aim/6886s flu enter CHARLES M. HALL, or DETROIT,

To all whom it may concern r anion.

MICHIGAN, ASSIGNOR TO G. M. HALL LAMP COMPANY,

OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

HEADLIGHT FOR VEHICLES.

Be it known that I, CHARLES M. HALL, a citizen of the United States of America,

. residing at Detroit, in the county of Wayne and State of Michigamhave invented certain new and useful Improvements in Headlights for Vehicles, of which the following is a specification, reference being had there-.

in tothe accompanying drawings.

' The invention relates to headlights more particularly designed for use on automobiles and other vehicles, and consists in certain features of construction as hereinafter set forth.

In the drawings-Figure 1 is a vertical central longitudinal section through the headlight; Fig. 2 is a horizontal section thereof;

Headlights of the type to which my in-- vention belongs are usually constructed to distribute a portion of the light through a comparatively wide angle for the lighting of the immediate foreground, while another portion is concentrated within a limited angle for long distance projection. The latter' is usei a1 where the vehicle is traveling at a comparatively high rate of speed as for instance over a country road-but upon the crowded streets of a city it is objectionable on account of the blinding efl'ect of the light upon any one in its path.

I It is therefore the principal object of the invention to provide means for diminishing the intensity of the light and particularly that used for long distance projection.

It is a further object to accomplish this result with a simple attachment which may be appliedto lights of standard construction.

the burner and the reflector E, and which is preferably formed of a translucent material permitting the passage of a portion of the Specification of Letters Patent. Application filed March 22, 1909. Serial No. 484,997.

PatentedFeb. 17, ieia.

light, but greatly diminishing its intensity. For this purpose, I preferably employ sheets of mica, as they will have the desired diminishing effect, and are also Well adapted to stand the heat concentrated thereupon. The mica is held by a suitable annular frame G and preferably so that it may be easily re moved or replaced, and also permitting of increasing or diminishing the number of sheets to vary the intensity of the transmitted light. As shown, a split ring H engaging a groove in the frame is employed for holding the mica sheets. The franle G is adjustably supported by anarm I, and this, as shown, is swiveled upon the gas pipe B; Thus a rotary adj ustin'ent is permitted, carrying the frame in one position intdproximity to the reflector E, while rotating through a quarter turn will arrange the.

screen at one side and out of the rays from the reflector, dotted lines, Fig. 1.

In use, when the vehicle is traveling along the city streets, the screenmay be adjusted, as shown in full lines in Fig. 1, and will path of the as illustrated in operate to deaden the reflection from the concave mirror E. "When, however, the in tense light for long distance projection is needed, it is only necessary to give the arm I a quarter turn, which will arrange the screen out of thepath of the rays.

That I claim as my invention is:

.1. In a lamp, the combination with a source of light and a rearwardly positioned reflector, of a translucent screen adapted to be interposed therebetween for dimming the intensity of the reflected light but out of the path of the forwardly projecting rays of unreflected light, said screen being adjustable to a position at the side of of the path of the light.

2. In a lamp, the combination with a body case, of a source of light therein, a rearwardlyositioned' reflector, a translucent screen or dimming the light from said source, and an arm carrying said screen rotatable in. a horizontal plane to'adjust the screen, said screen being arranged out of the path of the forwardly-projecting rays of light in one position of its adjustment, and being interposed between the source of light and the reflector in the path of the rethe lamp out fiected light, but out of the path of the forwardly-projecting rays of the unreflected light in another position of its adjustment.

3 In a lamp, the combination with a body case, of a vertically arranged burner therein for the source of light, a rearwardly-positioned reflector, a translucent screen, an arm extending laterally from and rotatable upon the burner carrying said screen, said screen being: arranged in one position of adjustment of said arm out of the path of the forwardly-projecting rays of light, and in another position of adjustment being inter posed between the reflector and the source of light in the path of the reflected light, but out of the path of the forwardly-projecting rays of the unrefiected light.

4. The combination with a source of light memes and a rearwardly-positioned reflector, of a translucent screen normally out of the path of the reflected light, said screen being movable to a position between said source of light and reflector for dimming the intensity of the reflected light, but out of the path of the forwardly projecting rays of unrefiected light.

In testimony whereof I afiix my signaturd in presence of two witnesses.

CHARLES M. HALL.

\Vitnesses:

I NELILIE KmsEL-LA,

W. J. BELKNAP. 

